Make a soup. Well, it doesn't have to be soup. Cook something that is comforting to you and takes time; so the whole day is anchored by this nourishing meal. Just you, the ingredients, and the recipe.
I mostly do selfportraits with watercolours inherited from my mum and greatgrandma. I find that it helps me process and communicate emotions + it's easy to get reference pictures. (i also draw other people, like lovers and friends, sometimes)